Overview Enhanced Quality Anti-Aliasing (EQAA) is a new anti-aliasing technology available from the AMD HD 6900 series of graphics cards onwards. This new Anti-Aliasing (AA) technology offers advanced smoothing of aliased edges without requiring additional video memory, and with a minimal performance cost.

Coverage Sample Details EQAA offers enhanced AA quality over standard Multi-Sample Anti-Aliasing (MSAA) modes by adding more coverage samples per pixel but keeping the same number of color/depth/stencil samples to achieve better AA quality than standard MSAA modes. Since it doesn’t require additional color/depth/stencil samples, it consumes the same video memory as the equivalent MSAA mode.

The coverage samples are used to test if a polygon is present at the location of the sample, and these samples can be used as the weight value for calculating the final color of the pixel. Because coverage samples can be gathered more easily than increasing color sample count, EQAA can increase AA quality with quite a small performance overhead. EQAA is also compatible with other existing AA techniques supported by AMD.